Abstract
Physical ageing behaviour of a semicrystalline polymer, polypropylene, has been studied at a pressure-temperature state (P=2.5 kbar,T=15° C) for which the amorphous region is in the glassy state. Polypropylene contains 57% crystallinity and its glass transition temperature at atmospheric condition is −20° C. The ageing behaviour was monitored by measuring the Young's modulus (E) from the stress-strain curves as a function of ageing time up to 200 h. The Young's modulus of the rapidly pressure quenched samples increased at 0.4% per ageing hour of the initial value for up to 30 h and tapered off thereafter. The glassy polypropylene also exhibited a memory behaviour when it was given a pressure perturbation.
Similar content being viewed by others
References
W. C. DALE and C. E. ROGERS,J. Appl. Polym. Sci. 16 (1972) 21.
R. M. KIMMEL and D. R. UHLMANN,J. Appl. Phys. 41 (1970) 2917.
—Idem., ibid. 42 (1971) 4917.
K. VIJAYAN, C.-L. TANG and K. D. PAE,Polymer. 29 (1988) 396.
T. S. CHOW,J. Polym. Sci., Polm. Phys. Edn. 22 (1984) 699.
A. J. KOVACS, J. J. AKLONIS, J. M. HUTCHINSON and A. R. RAMOS,J. Polym. Sci., Polym. Phys. Ed. 17 (1979) 1097.
K. D. PAE and K. VIJAYAN,Polymer 29 (1988) 405.
M. CIZMECIOGLU, R. F. FEDORS, S. D. HONG and J. MOACANIN,Polym. Eng. Sci. 21 (1981) 940.
J. A. SAUER and K. D. PAE, Proceedings 4th International Conference on High Pressure. Kyoto (1974) 17.
T. TAKEMURA, Proceedings 4th International Conference on High Pressure Kyoto (1974) 74.
H. N. YOON, K. D. PAE and J. A. SAUERJ. Polym. Sci. Polym. Phys. Edn. 14 (1976) 1611.
D. L. QUESTAD, K. D. PAE, J. I. SCHEINBEIM and B. A. NEWMAN,J. Appl. Phys. 52 (1981) 5977.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Min, B., Pae, K.D. Physical ageing of polypropylene in glassy state. J Mater Sci 24, 3613–3615 (1989). https://doi.org/10.1007/BF02385747
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF02385747